Also, now you can use the Objectify verify_file program to check any of the gNewSense releases after you download them, for example:

verify_file --public gnewsense-livecd-deltah-i386-2.3.iso

Note: I have changed the name of the verify_file program to file-verify in the next release, which I should be putting up on here in the next few days. Until then you can download the last release from the Objectify project: http://sourceforge.net/projects/objectify on SourceForge.